FR2437118A1 - CIRCUIT FOR PROCESSING RECORDING AND REPRODUCING SIGNALS - Google Patents

CIRCUIT FOR PROCESSING RECORDING AND REPRODUCING SIGNALS

Info

Publication number
FR2437118A1
FR2437118A1 FR7923728A FR7923728A FR2437118A1 FR 2437118 A1 FR2437118 A1 FR 2437118A1 FR 7923728 A FR7923728 A FR 7923728A FR 7923728 A FR7923728 A FR 7923728A FR 2437118 A1 FR2437118 A1 FR 2437118A1
Authority
FR
France
Prior art keywords
circuit
signal
frequency part
reproducing signals
control
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR7923728A
Other languages
French (fr)
Other versions
FR2437118B1 (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sony Corp
Original Assignee
Sony Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sony Corp filed Critical Sony Corp
Publication of FR2437118A1 publication Critical patent/FR2437118A1/en
Application granted granted Critical
Publication of FR2437118B1 publication Critical patent/FR2437118B1/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G9/00—Combinations of two or more types of control, e.g. gain control and tone control
    • H03G9/02—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers
    • H03G9/025—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers frequency-dependent volume compression or expansion, e.g. multiple-band systems
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G5/00—Tone control or bandwidth control in amplifiers
    • H03G5/16—Automatic control
    • H03G5/18—Automatic control in untuned amplifiers
    • H03G5/22—Automatic control in untuned amplifiers having semiconductor devices

Landscapes

  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Networks Using Active Elements (AREA)

Abstract

A.CIRCUIT DE TRAITEMENT DES SIGNAUX. B.CIRCUIT CARACTERISE PAR UN PREMIER SIGNAL DE COMMANDE CORRESPONDANT A L'AMPLITUDE DU SIGNAL D'ENTREE DANS LA PARTIE BASSE FREQUENCE DU SPECTRE AINSI QU'UN SECOND SIGNAL DE COMMANDE CORRESPONDANT A L'AMPLITUDE DU SIGNAL D'ENTREE POUR LA PARTIE HAUTE FREQUENCE DU SPECTRE, UN FILTRE PASSE-BAS POUR COMMANDER L'ATTENUATION DES SIGNAUX DANS LA PARTIE BASSE-FREQUENCE EN FONCTION DU PREMIER SIGNAL ET UN FILTRE PASSE-HAUT POUR COMMANDER L'ATTENUATION DES SIGNAUX DE LA PARTIE HAUTE-FREQUENCE EN FONCTION DU SECOND SIGNAL.A. SIGNAL PROCESSING CIRCUIT. B. CIRCUIT CHARACTERIZED BY A FIRST CONTROL SIGNAL CORRESPONDING TO THE AMPLITUDE OF THE INPUT SIGNAL IN THE LOW FREQUENCY PART OF THE SPECTRUM AS WELL AS A SECOND CONTROL SIGNAL CORRESPONDING TO THE AMPLITUDE OF THE INPUT SIGNAL FOR THE HIGH FREQUENCY PART SPECTRUM, A LOW PASS FILTER TO CONTROL THE ATTENUATION OF SIGNALS IN THE LOW FREQUENCY PART ACCORDING TO THE FIRST SIGNAL AND A HIGH PASS FILTER TO CONTROL THE ATTENUATION OF THE SIGNALS OF THE HIGH FREQUENCY PART ACCORDING TO THE SECOND SIGNAL .

FR7923728A 1978-09-22 1979-09-24 CIRCUIT FOR PROCESSING RECORDING AND REPRODUCING SIGNALS Expired FR2437118B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11682878A JPS5545112A (en) 1978-09-22 1978-09-22 Signal transmitter

Publications (2)

Publication Number Publication Date
FR2437118A1 true FR2437118A1 (en) 1980-04-18
FR2437118B1 FR2437118B1 (en) 1985-06-28

Family

ID=14696623

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7923728A Expired FR2437118B1 (en) 1978-09-22 1979-09-24 CIRCUIT FOR PROCESSING RECORDING AND REPRODUCING SIGNALS

Country Status (7)

Country Link
US (1) US4306201A (en)
JP (1) JPS5545112A (en)
CA (1) CA1131355A (en)
DE (1) DE2938378A1 (en)
FR (1) FR2437118B1 (en)
GB (1) GB2032230B (en)
NL (1) NL7907014A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0583492A1 (en) * 1992-07-31 1994-02-23 Aphex Systems, Ltd. Audio signal bass frequency enhancement device

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3616878B2 (en) * 2002-01-17 2005-02-02 オンキヨー株式会社 Low pass filter
US8885275B1 (en) * 2013-12-18 2014-11-11 HGST Netherlands B.V. System and method for ATI/FTI detection in magnetic media
US9218847B2 (en) * 2013-12-18 2015-12-22 HGST Netherlands B.V. System and method for testing data storage systems utilizing micro-transitions

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2395159A (en) * 1942-06-29 1946-02-19 Rca Corp Electrical compressor method and system
GB1115015A (en) * 1966-03-01 1968-05-22 Rank Organisation Ltd Improvements in or relating to automatic bandwidth adjustment of an audio frequency signal
US3795876A (en) * 1971-04-06 1974-03-05 Victor Company Of Japan Compression and/or expansion system and circuit
DE2723172A1 (en) * 1976-05-21 1977-11-24 Tokyo Shibaura Electric Co NOISE REDUCTION DEVICE

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE232937C (en) *
US3665345A (en) * 1969-07-21 1972-05-23 Dolby Laboratories Inc Compressors and expanders for noise reduction systems
JPS51127608A (en) * 1975-04-30 1976-11-06 Victor Co Of Japan Ltd Signal transmitting unit
JPS5912746Y2 (en) * 1976-10-30 1984-04-17 赤井電機株式会社 Noise reduction device for tape recorders, etc.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2395159A (en) * 1942-06-29 1946-02-19 Rca Corp Electrical compressor method and system
GB1115015A (en) * 1966-03-01 1968-05-22 Rank Organisation Ltd Improvements in or relating to automatic bandwidth adjustment of an audio frequency signal
US3795876A (en) * 1971-04-06 1974-03-05 Victor Company Of Japan Compression and/or expansion system and circuit
DE2723172A1 (en) * 1976-05-21 1977-11-24 Tokyo Shibaura Electric Co NOISE REDUCTION DEVICE

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0583492A1 (en) * 1992-07-31 1994-02-23 Aphex Systems, Ltd. Audio signal bass frequency enhancement device

Also Published As

Publication number Publication date
GB2032230A (en) 1980-04-30
GB2032230B (en) 1982-10-13
JPS6136304B2 (en) 1986-08-18
CA1131355A (en) 1982-09-07
NL7907014A (en) 1980-03-25
JPS5545112A (en) 1980-03-29
FR2437118B1 (en) 1985-06-28
US4306201A (en) 1981-12-15
DE2938378A1 (en) 1980-04-03

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Legal Events

Date Code Title Description
ST Notification of lapse